var createError = require('http-errors');//404检测错误页 var express = require('express'); var path = require('path'); var cookieParser = require('cookie-parser');//解析cookie var logger = require('morgan');//生成日志 var indexRouter = require('./routes/index'); var usersRouter = require('./routes/users'); var app = express(); // view engine setup 注册前端模板视图 app.set('views', path.join(__dirname, 'views')); app.set('view engine', 'jade'); app.use(logger('dev'));//注册日志 app.use(express.json());//post请求参数JSON格式 req.body获取 app.use(express.urlencoded({ extended: false }));//类似表单提交参数获取 app.use(cookieParser()); // app.use(express.static(path.join(__dirname, 'public')));//注册静态文件 //注册路由 app.use('/', indexRouter); app.use('/users', usersRouter); // catch 404 and forward to error handler app.use(function(req, res, next) { next(createError(404)); }); // error handler 程序出问题时的提示 app.use(function(err, req, res, next) { // set locals, only providing error in development res.locals.message = err.message; res.locals.error = req.app.get('env') === 'dev' ? err : {}; // render the error page res.status(err.status || 500); res.render('error'); }); module.exports = app;